Cindy, is it possible that your babies could have snacked on a "no-no" outside that upset their tummy?   This is probably a dumb question to ask, but did you switch them over gradually mixing old food and new?   
That never worked for me, my babies would always pick out what they wanted and leave the rest so when I changed from Wellness to Innova, I just switched with no problems.  My girls (didn't have Peppy at the time) have iron stomachs, I mean, anyone who can eat horse poop and smile, well what's a little Innova?        |